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Glossary term: 천문단위

Also known as 에이유

Description: 천문단위(AU)는 거리를 나타내는 단위로, 정확히 149,597,870.7킬로미터(km)에 해당합니다. 이 값은 지구와 태양 사이의 평균 거리와 거의 같으며, 예전에는 이 평균 거리가 천문단위의 정의로 사용되었습니다. 천문단위는 태양계나 다른 행성계, 항성계의 거리를 표현할 때 자주 쓰입니다. 예를 들어, 해왕성은 태양으로부터 약 30AU 거리의 궤도를 돌고 있습니다.

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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

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Related Diagrams


Concentric circles for the orbits of Mercury, Venus, Earth and Mars. The Earth to Sun distance is marked as IAU

Astronomical Unit

Caption: An astronomical unit (AU) is a convenient unit of distance equal to exactly 149,597,870.7 kilometers (km). This is approximately the average distance between the Earth and the Sun, which was a previous definition of the AU. The AU is often used to measure distances in the Solar System and in other planetary or stellar systems.
Credit: Danielle Futselaar/IAU OAE

License: CC-BY-4.0 Creative Commons 저작자표시 4.0 국제 (CC BY 4.0) icons